Rexml: rexml: denial of service via inefficient regex parsing

Summary

CVE	CVE-2025-10990
State	PUBLISHED
Assigner	redhat
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-02-27 14:16:27 UTC
Updated	2026-06-26 00:16:45 UTC
Description	A flaw was found in REXML. A remote attacker could exploit inefficient regular expression (regex) parsing when processing hex numeric character references (&#x...;) in XML documents. This could lead to a Regular Expression Denial of Service (ReDoS), impacting the availability of the affected component. This issue is the result of an incomplete fix for CVE-2024-49761.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.004680000 probability, percentile 0.370860000 (date 2026-06-29)

Problem Types: CWE-1333 | CWE-1333 Inefficient Regular Expression Complexity

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Secondary	7.5	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
3.1	CNA	CVSS	7.5	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Red Hat	Red Hat Satellite 6.16 For RHEL 8	unaffected 0:8.8.1-3.el8sat * rpm	Not specified
CNA	Red Hat	Red Hat Satellite 6.16 For RHEL 8	unaffected 0:8.8.1-3.el8sat * rpm	Not specified
CNA	Red Hat	Red Hat Satellite 6.16 For RHEL 9	unaffected 0:8.8.1-3.el9sat * rpm	Not specified
CNA	Red Hat	Red Hat Satellite 6.16 For RHEL 9	unaffected 0:8.8.1-3.el9sat * rpm	Not specified
CNA	Red Hat	Red Hat Satellite 6.17 For RHEL 9	unaffected 0:8.8.1-3.el9sat * rpm	Not specified
CNA	Red Hat	Red Hat Satellite 6.17 For RHEL 9	unaffected 0:8.8.1-3.el9sat * rpm	Not specified
CNA	Red Hat	Satellite Client 6 For RHEL 8	unaffected 0:7.34.0-4.el8sat * rpm	Not specified
CNA	Red Hat	Satellite Client 6 For RHEL 9	unaffected 0:7.34.0-4.el9sat * rpm	Not specified

References

Reference	Source	Link	Tags
access.redhat.com/errata/RHSA-2025:17606	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:17613	[email protected]	access.redhat.com
github.com/ruby/rexml/commit/ce59f2eb1aeb371fe1643414f06618dbe031979f	[email protected]	github.com
bugzilla.redhat.com/show_bug.cgi	[email protected]	bugzilla.redhat.com
www.ruby-lang.org/en/news/2024/10/28/redos-rexml-cve-2024-49761	[email protected]	www.ruby-lang.org
access.redhat.com/security/cve/CVE-2025-10990	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:17693	[email protected]	access.redhat.com
github.com/ruby/rexml/security/advisories/GHSA-2rxp-v6pw-ch6m	[email protected]	github.com
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

Additional Advisory Data

Source	Time	Event
CNA	2025-09-25T00:00:00.000Z	Reported to Red Hat.
CNA	2025-09-25T00:00:00.000Z	Made public.

Workarounds

CNA: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

There are currently no legacy QID mappings associated with this CVE.